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Finding the Fourth Proportional to 15,295.70, 21,108.04 and 8,922.56

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Solution

The fourth proportional to 15,295.70, 21,108.04 and 8,922.56 is: 12,313.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,295.70 : 21,108.04 = 8,922.56 : x
  2. Step 2: Convert to fraction form
    15,295.70/21,108.04 = 8,922.56/x
  3. Step 3: Cross multiply
    15,295.70x = 21,108.04 × 8,922.56
  4. Step 4: Simplify right side
    15,295.70x = 188,337,625.54
  5. Step 5: Solve for x
    x = 188,337,625.54/15,295.70
  6. Step 6: Final answer
    x = 12,313.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.